HEART RIVER BASIN

                       06346000  LAKE TSCHIDA NEAR GLEN ULLIN, ND

LOCATION.--Lat 4635'43", long 10148'34", in SW1/4 NE1/4 sec.13, T.136 N., R.89 W., Grant County, Hydrologic Unit 10130202, 
   10 mi upstream from Heart Butte Creek, and 14 mi north of Elgin.

DRAINAGE AREA.--1,710 mi2, approximately.

                                         MONTHEND-ELEVATION AND CONTENTS RECORDS

PERIOD OF RECORD.--August 1949 to current year.  Prior to October 1957, published as Heart Butte Reservoir near Glen Ullin.

GAGE.--Water-stage recorder.  Datum of gage is at sea level (levels by Bureau of Reclamation).

REMARKS.--Reservoir is formed by earth-fill dam; storage began Sept. 29, 1949; dam completed Dec. 9, 1949.  Total capacity 
   is 430,000 acre-ft at maximum pool, elevation, 2,118.2 ft.  Dead storage is 6,750 acre-ft below lowest point of outlet, 
   elevation, 2,030.0 ft.  Active conservation storage is 69,030 acre-ft between elevations 2,030.0 ft and 2,064.5 ft, 
   crest of spillway.  Figures given herein represent total contents based on capacity table dated August 1992.

   Controlled releases are through 4 by 5 ft slide gate.  The spillway is uncontrolled "glory hole" type and discharges 
   through a conduit 14 ft in diameter.  The reservoir is for flood control, irrigation, and incidental water supply.

COOPERATION.--Records furnished by U.S. Bureau of Reclamation.  Extremes are those observed.

EXTREMES FOR PERIOD OF RECORD.--Maximum contents, 174,000 acre-ft, Apr. 9, 1952, elevation, 2,086.23 ft; minimum since 
   first reaching spillway level, 32,820 acre-ft, Oct. 25, 1991, elevation, 2,049.00 ft.

EXTREMES FOR CURRENT YEAR.--Maximum contents, 65,470 acre-ft, May 29, elevation, 2,063.99 ft; minimum, 55,830 acre-ft, 
   Sept. 27-30; elevation, 2,060.90 ft.


                   MONTHEND ELEVATION AND CONTENTS AT 2400, WATER YEAR OCTOBER 1999 TO SEPTEMBER 2000
                       
___________________________________________________________________________________________________________________

                     Date                            Elevation              Contents            Change in contents
                                                      (feet)              (acre-feet)              (acre-feet)
___________________________________________________________________________________________________________________

Sept.30 ----------------------------                 2,062.39               60,370                     --
Oct. 31 ----------------------------                 2,062.10               59,470                     -900
Nov. 30 ----------------------------                 2,062.01               59,200                     -270
Dec. 31 ----------------------------                 2,061.94               58,980                     -220

    CAL YR 1999                                         --                    --                     -6,780

Jan. 31 ----------------------------                 2,061.42               57,390                   -1,590
Feb. 29 ----------------------------                 2,061.59               57,910                     +520
Mar. 31 ----------------------------                 2,062.99               62,260                   +4,350
Apr. 30 ----------------------------                 2,063.59               64,180                   +1,920
May  31 ----------------------------                 2,063.95               65,340                   +1,160
June 30 ----------------------------                 2,063.62               64,270                   -1,070
July 31 ----------------------------                 2,063.18               62,860                   -1,410
Aug. 31 ----------------------------                 2,061.72               58,300                   -4,560
Sept.30 ----------------------------                 2,060.90               55,830                   -2,470

    WTR YR 2000                                         --                    --                     -4,540
___________________________________________________________________________________________________________________




                                                     WATER-QUALITY RECORDS

PERIOD OF RECORD.--Water years 1971, 1980 to current year.

REMARKS.--Quality assurance sample also collected at this location

                                 WATER-QUALITY DATA, WATER YEAR OCTOBER 1999 TO SEPTEMBER 2000

                                        DEPTH     SPE-     PH                         ANC
                                        TO TOP   CIFIC    WATER             HARD-   UNFLTRD            MAGNE-
                                          OF      CON-    WHOLE    COLOR    NESS    TIT 4.5  CALCIUM    SIUM,
                                        SAMPLE   DUCT-     LAB     (PLAT-   TOTAL     LAB     DIS-      DIS-
                                        INTER-   ANCE    (STAND-   INUM-    (MG/L    (MG/L    SOLVED   SOLVED
                      DATE      TIME   VAL(IN     LAB      ARD     COBALT    AS       AS      (MG/L    (MG/L
                                       METERS)  (US/CM)   UNITS)   UNITS)   CACO3)   CACO3)   AS CA)   AS MG)
                                       (82047)  (90095)  (00403)  (00080)  (00900)  (90410)  (00915)  (00925)

                  MAY
                    26...       0950     1.0     1700      8.3      15       440      278     75.3     60.4
                  JUL
                    25...       1305     1.0     1730      8.5      21       430      277     73.7     59.0
                  SEP
                    27...       1100     1.0     1800      8.7      12       440      267     74.3     62.4


                                                                                                      SOLIDS,
                                                 SODIUM   POTAS-            CHLO-    FLUO-   SILICA,  SUM OF
                              SODIUM,              AD-     SIUM,  SULFATE   RIDE,    RIDE,    DIS-    CONSTI-
                               DIS-              SORP-     DIS-    DIS-     DIS-      DIS-    SOLVED  TUENTS,
                              SOLVED              TION    SOLVED   SOLVED   SOLVED   SOLVED   (MG/L     DIS-
                      DATE     (MG/L    SODIUM   RATIO    (MG/L    (MG/L    (MG/L    (MG/L     AS      SOLVED
                               AS NA)  PERCENT            AS K)   AS SO4)   AS CL)   AS F)    SIO2)    (MG/L)
                              (00930)  (00932)  (00931)  (00935)  (00945)  (00940)  (00950)  (00955)  (70301)

                  MAY
                    26...       224      52        5       9.9      616     11.1       .3      1.3     1170
                  JUL
                    25...       222      52        5      10.9      648     10.9      <.1      1.3     1190
                  SEP
                    27...       239      53        5      10.9      665     12.1       .3       .3     1220


                                   SOLIDS,            NITRO-   NITRO-   NITRO-            PHOS-
                                   RESIDUE  SOLIDS,    GEN,     GEN,     GEN,    PHOS-   PHORUS
                                   AT 180     DIS-   NITRITE  NO2+NO3  AMMONIA  PHORUS    ORTHO,   BORON,
                                    DEG. C   SOLVED    DIS-     DIS-     DIS-     DIS-    DIS-      DIS-
                                     DIS-    (TONS    SOLVED   SOLVED   SOLVED   SOLVED  SOLVED    SOLVED
                           DATE     SOLVED    PER     (MG/L    (MG/L    (MG/L    (MG/L   (MG/L     (UG/L
                                    (MG/L)   AC-FT)   AS N)    AS N)    AS N)    AS P)   AS P)     AS B)
                                   (70300)  (70303)  (00613)  (00631)  (00608)  (00666)  (00671)  (01020)

                       MAY
                         26...      1210     1.65     <.010     .121     .024    E.036    <.010     316
                       JUL
                         25...      1240     1.69     <.010     .069    <.020    <.050    <.010     321
                       SEP
                         27...      1250     1.69     <.010    <.050    <.020    E.032     .016     331


                                                                             PH
                                                                   SPE-     WATER
                                                                   CIFIC    WHOLE
                                                 RESER-    SAM-    CON-     FIELD   TEMPER-  OXYGEN,
                                                  VOIR    PLING    DUCT-   (STAND-   ATURE     DIS-
                               DATE      TIME    DEPTH    DEPTH    ANCE      ARD     WATER    SOLVED
                                                 (FEET)    (M)    (US/CM)   UNITS)  (DEG C)   (MG/L)
                                                (72025)  (00098)  (00095)  (00400)  (00010)  (00300)

                           MAY
                             26...       0950    32.8       .00    1680      8.4     14.8      9.4
                             26...       0951      --      1.7     1670      8.4     14.7      9.2
                             26...       0952      --      3.1     1700      8.4     14.7      9.1
                             26...       0953      --      4.5     1660      8.4     14.1      9.0
                             26...       0954      --      6.1     1680      8.4     14.6      8.8
                             26...       0955      --      7.5     1670      8.4     14.6      8.9
                             26...       0956      --      9.3     1680      8.4     14.6      8.9
                             26...       0957      --     10.0     1690      8.4     14.6      8.7
                           JUL
                             25...       1300    26.9       .00    1760      8.2     22.4      8.8
                             25...       1301      --      2.0     1760      8.2     22.4      8.5
                             25...       1302      --      4.0     1760      8.3     22.4      8.5
                             25...       1303      --      1.0     1760      8.3     22.4      8.5
                             25...       1304      --      8.2     1760      8.3     22.3      8.4
                           SEP
                             27...       1050    44.3       .00    1820      8.4     14.3      9.7
                             27...       1051      --       .50    1830      8.5     14.3      9.6
                             27...       1052      --      1.0     1830      8.5     14.2      9.6
                             27...       1053      --      2.0     1830      8.6     14.2      9.4
                             27...       1054      --      4.0     1830      8.6     14.2      9.1
                             27...       1055      --      6.0     1830      8.6     14.1      8.0
                             27...       1056      --      8.0     1830      8.6     14.1      7.6
                             27...       1057      --     10.0     1840      8.6     14.0      7.6
                             27...       1058      --     12.0     1840      8.6     14.0      7.3
                             27...       1059      --     13.5     1830      8.6     14.0      6.9


                                            OXYGEN,   BARO-                      WIND
                                              DIS-    METRIC   TRANS-            DIREC-
                                             SOLVED   PRES-     PAR-              TION    WIND
                                             (PER-     SURE     ENCY   TEMPER-   (DEG.    SPEED
                                              CENT     (MM    (SECCHI   ATURE     FROM   (MILES
                                    DATE     SATUR-     OF     DISK)     AIR      TRUE     PER
                                             ATION)    HG)      (IN)   (DEG C)   NORTH)   HOUR)
                                            (00301)  (00025)  (00077)  (00020)  (00036)  (00035)

                                MAY
                                  26...       102      699     82.0     18.0      110      5.0
                                  26...        --       --       --       --       --       --
                                  26...        --       --       --       --       --       --
                                  26...        --       --       --       --       --       --
                                  26...        --       --       --       --       --       --
                                  26...        --       --       --       --       --       --
                                  26...        --       --       --       --       --       --
                                  26...        --       --       --       --       --       --
                                JUL
                                  25...       111      696     77.0     24.0      290     18
                                  25...        --       --       --       --       --       --
                                  25...        --       --       --       --       --       --
                                  25...        --       --       --       --       --       --
                                  25...        --       --       --       --       --       --
                                SEP
                                  27...       104      701     71.0     12.0      185     <5.0
                                  27...        --       --       --       --       --       --
                                  27...        --       --       --       --       --       --
                                  27...        --       --       --       --       --       --
                                  27...        --       --       --       --       --       --
                                  27...        --       --       --       --       --       --
                                  27...        --       --       --       --       --       --
                                  27...        --       --       --       --       --       --
                                  27...        --       --       --       --       --       --
                                  27...        --       --       --       --       --       --

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